As mentioned in previous articles, having a good resource bank helps a great deal in the classroom. I for example create playlists with the music that I am going to use in future lessons. This is a great way to introduce new songs and lyrics. If the song is already familiar with a song, it saves a lot of time in the teaching of its lyrics and when innitiating activities with said song. Here is a link to an iTunes search engine where we know we can find almost any song by any artist.
Also, here is a link to the iTunes book store (iBooksstore)